Mackay Idaho ZIP Codes

Mackay holds a single ZIP code.

Every ZIP code in Mackay

The complete list of Mackay, Idaho ZIP codes with the county each falls in.
ZIP code	County
83251	Custer County

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Mackay codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Mackay. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Mackay ZIP code begins 832. Those first three digits identify the sectional center facility that processes mail for this part of Idaho. Statewide that range covers 57 ZIP codes, so Mackay accounts for 2% of it.

Every Idaho ZIP prefix and the region it covers →

Area codes covering Mackay

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Mackay occupies.

Mackay Idaho area codes in full →

Where Mackay's ZIP codes sit

Each point is one Mackay ZIP code, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Cities near Mackay

The closest places to Mackay with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Moore Idaho ZIP codes	17 mi	1 ZIP code
Arco Idaho ZIP codes	25 mi	1 ZIP code
Sun Valley Idaho ZIP codes	39 mi	2 ZIP codes
Ketchum Idaho ZIP codes	41 mi	1 ZIP code
Hailey Idaho ZIP codes	44 mi	1 ZIP code
Bellevue Idaho ZIP codes	44 mi	1 ZIP code
Carey Idaho ZIP codes	45 mi	1 ZIP code
Clayton Idaho ZIP codes	45 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance.